#!/bin/sh
# Freifunk Firewall addons
# $Id: firewall.freifunk 4772 2009-06-07 11:58:40Z jow $


#
# Apply advanced settings
#
apply_advanced() {
	local tcp_ecn
	local tcp_window_scaling
	local accept_redirects
	local accept_source_route

	config_get_bool tcp_ecn $1 tcp_ecn 1
	config_get ip_conntrack_max $1 ip_conntrack_max
	config_get_bool tcp_westwood $1 tcp_westwood 0
	config_get_bool tcp_window_scaling $1 tcp_window_scaling 1
	config_get_bool accept_redirects $1 accept_redirects 0
	config_get_bool accept_source_route $1 accept_source_route 0

	logger -t firewall.freifunk "tcp_ecn is $tcp_ecn"
	logger -t firewall.freifunk "tcp_window_scaling is $tcp_window_scaling"
	logger -t firewall.freifunk "accept_redirects is $accept_redirects"
	logger -t firewall.freifunk "accept_source_route is $accept_source_route"

	sysctl -w net.ipv4.tcp_ecn=$tcp_ecn >/dev/null
	sysctl -w net.ipv4.tcp_window_scaling=$tcp_window_scaling >/dev/null
	sysctl -w net.ipv4.tcp_westwood=$tcp_westwood >/dev/null
	sysctl -w net.ipv4.ip_conntrack_max=$ip_conntrack_max >/dev/null

	for f in /proc/sys/net/ipv4/conf/*/accept_redirects; do
		echo $accept_redirects > $f
	done

	for f in /proc/sys/net/ipv4/conf/*/accept_source_route; do
		echo $accept_source_route > $f
	done
}

config_foreach apply_advanced advanced


#
# Apply fixes for masquerading rules
#
apply_nat_fix() {
	local up
	local ifname
	config_get up $1 up
	[ -n "$up" ] || return 0
	(ACTION="ifup" INTERFACE="$1" . /etc/hotplug.d/iface/22-firewall-nat-fix )
}

uci_set_state firewall core loaded 1
config_foreach fw_addif interface
config_foreach apply_nat_fix interface

[ -x /etc/init.d/luci_splash ] && ( sleep 3; /etc/init.d/luci_splash restart )&

[ -x /etc/init.d/freifunk-p2pblock ] && /etc/init.d/freifunk-p2pblock enabled && \
	( sleep 3; /etc/init.d/freifunk-p2pblock restart )&
